Scientists from Novosibirsk State Technical University (NSTU), together with colleagues from the Institute of Nuclear Physics SB RAS, have created innovative multifunctional protective nano-coatings based on boron compounds with the addition of tantalum and chromium. The development is designed to significantly extend the service life of parts in mechanical engineering operating under extreme conditions.
Tests have confirmed that the new coatings are 6 times superior to stainless steel in terms of wear resistance. In addition, they demonstrate outstanding heat resistance: at a temperature of 850 °C, some compositions are 6 times more effective than conventional stainless steel, and some options can withstand heating up to 950 °C without significant loss of properties.
The technology is based on borides, which have exceptionally high hardness, strength, and resistance to chemically aggressive environments. To enhance corrosion protection, micro-additives of tantalum and chromium, refractory and corrosion-resistant elements, were introduced into the surfacing mixtures. These components quickly form a protective film upon contact with acids, which significantly increases the corrosion resistance of the coatings.
